diff options
Diffstat (limited to 'support/dependencies/check-host-tar.sh')
| -rwxr-xr-x | support/dependencies/check-host-tar.sh | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/support/dependencies/check-host-tar.sh b/support/dependencies/check-host-tar.sh new file mode 100755 index 000000000..2cfc2b3cc --- /dev/null +++ b/support/dependencies/check-host-tar.sh @@ -0,0 +1,35 @@ +#!/bin/sh + +candidate="$1" + +tar=`which $candidate` +if [ ! -x "$tar" ]; then + tar=`which tar` + if [ ! -x "$tar" ]; then + # echo nothing: no suitable tar found + exit 1 + fi +fi + +# Output of 'tar --version' examples: +# tar (GNU tar) 1.15.1 +# tar (GNU tar) 1.25 +version=`$tar --version | head -n 1 | sed 's/^.*\s\([0-9]\+\.\S\+\).*$/\1/'` +major=`echo "$version" | cut -d. -f1` +minor=`echo "$version" | cut -d. -f2` +bugfix=`echo "$version" | cut -d. -f3` + +# Minimal version = 1.17 (previous versions do not correctly unpack archives +# containing hard-links if the --strip-components option is used). +major_min=1 +minor_min=17 +if [ $major -gt $major_min ]; then + echo $tar +else + if [ $major -eq $major_min -a $minor -ge $minor_min ]; then + echo $tar + else + # echo nothing: no suitable tar found + exit 1 + fi +fi |